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JAMES WARREN DAVISOF WASHINGTON, DISTRICT 0F COLUMBIA.

' Leffe" Patent No. 61,724, mammary 5, 1,867.

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Be it known that I, JAMES WAnnnN DAVIS, of the city of Washington, intheDistrict of Columbia, have invented new and useful improvements inSpring BedBottoms and I do hereby declare the following to be a i'ulland exact description of the same, reference being had to theaccompanying drawing, making part of this specification, and in which-Figure 1 is a bottom View of my `improvements; and Figure 2, alongitudinal section lof the same in the line :v z, iig. 1. Similarletters of reference indicate corresponding parts in the two figures. Myinvention consists inthe use of two sets of wooden springs, the upperends of which are securely held l on movable bars, whilst-. their lowerends, interlocking each other, play through mortises in sliding bars,and

are entirely free.

In the drawings, A isthe head end and B the foot end of a frame,constructed in two pieces, hinged together at a, and having fastened toit the mattress C. D D are braces, holding each of the two parts A Btogether. On each side of the frame, near the head and foot-boards E E',are pivoted plates b b', each two opposite ones bearing between thembars F F', which are pivoted to the lower ends of the plates b b'. Tothe upper side of these bars F F the upper ends of the wooden springs GG' are securely fastened, their lower ends interlocking each other, andpassing through mortises H H' in guide-bars c c'. The ends of theselatter cross-bars are provided with pins e e', vwhich move in slots d dlaterally, and alsoA allow the bars c c' to turn around their own axes,as clearly shown in iig. 2. When pressure is exertedon the bed it .tendsto straighten the curved springs, and consequently to elongate them;they having free play through the mor-tises H H', the Asprings are thusprevented from breaking, which is frequently the case with woodensprings confined at both ends. A very free play is allowed these springsby means of the barsF F', which are pivotedand have a lateral movement.Should any of the springs break it is very easy to replace them. l.Afterloosening them from the bars F or F', they are drawn out and replaced bynew onesy The cross-bars c c', being swivelled so asr to turn on theirown'axes, enables them to turn when the springs straighten, and thusfollow every movement of the same, guiding and supporting them withouthaving any tendency to break them; I construct my bed frame in twoparts, so as to enable the head end to be raised and lowered accordingto the desire of persons using them. When raised, two legs I I', nwhichare hinged to the frame, retain it in position. I form the slots d'd'either in the framesA and B, or cast or otherwise form them of metal,and attach them by nails or screws. to the frame. I propose to use mysprings not only in bedsteads, but also in sofas, lounges, railroad-carseats, and wherever I can employ them.v

Having thus described my invention, what I claimas new, and desire tosecure by Letters Patent, is-

1. The curved wooden springs G G' interlocking with each other` securedat theirupper ends, and having their lower ends free, which ends passthrough slots in guide-bars c c', substantially as described.

2. The guidebars c e', provided with mortises'H H', and pins ee',working in slots d d', substantially as described. Y

3. The plates b b', in combination with the pivoted head and foot-bars FF', for the purpose and in` the manner described.- v i v 4.The-combination of the wooden springs G Gr', bars F F', plates b b',guide-baise c provided with mortises H H', and pins e e', slots d cl',and mattress C, substantially as and for the purpose set forth.

A JAMES WARREN DAVIS.

Witnesses:

W. A. Boss, C. K EMBEL.

